Triple valve.



lNo. 682,499. Patented Sept. IU, 190|.

.1. w. SHAFER. TmPLs VALVE.

(Application led Feb. 11, 1901.) (No Model.)

' VUNITED STATES rricn.

JOHN 1WILLIAM SI-IAFER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALE TO BELLE BRADRICK, OF SAME PLACE.

TRIPLE VALVE.

SPECIFICATION forming part f Letters Patent No. 682,499, dated September 10, 1901.

I Application led February 1l, 1901. Serial No. 46,928. (No model.)

To all whom, it 1v1/Cty concern:

Be it known that I, JOHN WILLIAM SHAFER, a citizen of thc United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Triple Valves, of which the following is a full, clear, and exact description.

My invention relates to certain improvements in air-brakes, and it consists of means whereby the triple valve is prevented from sticking in releasing the brakes, thereby obviating dat Wheels, and with this and minor objects in view my invention consists of the parts and combination of parts, as will be hereinafter more fully set out.

The drawing illustrating my invention is an elevation of a triple valve, partly in section, with my invention embodied.

1 represents the well-known triple-valve body.

2 is the piston working in the slide-valve chamber, having the head 3, which is provided with the usual packing 4.

5 is a packing secured in the chamber 6, against which the head 3 works.

7 is the drain-cup. The top of the draincup is tapped at 8, and a short section of pipe 9, threaded at both ends, is secured in said tap.

lO isa union having internal screw-threads adapted to mesh with the threads on one end of the said pipe 9. The said union 10 is provided on one end with an annular inwardlyextending iiange 11.

12 is a coupling having an annular rib or projection 13, adapted to work freely in the union 10 under the annular lug or projection 1l of said union, said coupling being held in position in the union by reason of its abutting one end of the pipe 9.

14 is a cylinder provided with interior screwthreads at each end.

15 is a plug having a central bore and provided with exterior screw-threads adapted to mesh with the screw-threads in one end of the cylinder 14., said plug having an annular projection 1G.

17 represents Washers of approved construction and material secured between the lower end of the plug 15 and cylinder It, thereby making a tight joint.

18 is a plug having a central bore and substantially ofthe same construction as the plug 15, the one difference being that the outer end of said plug is provided with screwthreads 19.

2O is another coupling having a central bore and provided with an annular rim or projection 2l, below which are formed screwthreads adapted to mesh with the threads 19 of the plug 1S.

22 is an elbow firmly secured to the coupling 2O by means of suitable screw-threads, and 23 is a pipe suitably secured to said elbow, said pipe 23 extending down tothe draincup 7, into which it is tapped at 24.,` said pipe 23 being provided with a suitable cut-off 25.

26 is a piston adapted to work within the chamber or cylinder 14. and provided with a rod 27, extending through said cylinder, the coupling 12, the pipe 9, and drain-cup 7 and adapted to be in contact with the piston-head 3, as shown in the drawing. It will be noticed in the drawing that a packing is placed in the coupling 12 and pipe 9 around the piston-rod 27, whereby the rod fits snugly therein fluid-tight.

2S is a cylinder in which are mounted pistons 29, suitably connected by means of the rod 30. 3l is a coil-spring secured around said rod,one end of which is seated against one of the pistons, while the other end is seated against one end of said cylinder 28. 32 is a pipe leading from the said cylinder through' the drain-cup 7 into the chamber ti.

33 is an oil cup or receptacle secured on top of the cylinder and having a suitable opening 34 leading into the chamber 2S above the pistons 29.

35 is a suitable pipe or way leading from the pipe 23 and connected to and having communication with the chamber 28 in front of the pistons 29 by means of the coupling 36.

38 is an outlet-port.

In releasing the brakes by increasing the train-pipe pressure heretofore it has been found that the slide-valve and piston-head 3, by reason of wear, dac., become tangent with their bearing, and thus have a tendency to ff; stick, thus retarding, if not entirely pre- Vent-ing,their movement, whereby the brakes stick on the Wheels,causing what is known as flat Wheels. This is obviated by my invention, inasmuch as a portion of the iuid from the train-pipe passes through the pipe 23 into the chamber 14, Where it strikes the piston 26, thereby forcing` it down and by reason of the rod 27 bearing upon the head 3 pushes said head, with its rod and sliding Valve, into proper position and forces the same down. At the same time a portion ot' the liuid passes through the pipe 35 into the chamber 2S and forces the pistons 29 to one end of said chamber, thereby permitting oil from the oil-cup to pass through the pipe 32 into the chamber G for lubricating said chamher every time the Valve is operated. Vhen the engineer knows that the triple valve isin perfect Workngconditiomthe cut-offis closed, as it is unnecessary for the piston 26 With its rod to operate upon the Valve; but it Will be seen that the automatic supply of oil to the chamber 6 is not interrupted inasmuch as the oiling mechanism is connected with the pipe 23 below the cut-oi.

What I claim, and desire to secure by Letters Patent, is-

l. The combination with a triple Valve, of a cylinder connected with the drain-cup, a piston adapted to Work in said cylinder and a piston-rod connected With said piston and adapted to operate the piston-rod and slide- Valve and graduating-valve when the trainpipe pressure is increased.

2. The combination with a train-pipe Valve, of a pipe leading from the drain-cup, a cylinder and a piston-rod connected with said pipe and the means for connecting said cylinder and piston-rod with said drain-cup, a piston-rod projecting into the piston-chamber and moving the piston, a piston, sliding valve and graduated valve.

3. The combination With a triple valve, of a pipe leading from the drain-cup, a chamber connected with said pipe, another pipe leading into the drain-cup, a coupling connecting the last-named pipe and said chamber, a piston located Within said chamber and a rod extending from said piston through the chamber into the triple-Valve casing into contact with the piston-head 3.

JOHN VILLIAM SHAFER.

Wfitnesses:

MARY BELLE BRADRIGK, ALBERT JANo. 

